package ooday01;

public class ConsDemo {
    public static void main(String[] args) {
    Student zs =new Student();
    Student ls=new Student("李四",88);
    Student ww=new Student("王五",12,"202302","003");

    zs.sayHi();
    ls.sayHi();
    ww.sayHi();
    ww.playWith("赵四");
    }
}
